Mixing-machine.



R. TIEDTKE.

MIXING MACHINE.

APPLICATION FILED MAB.. 30, 1908.

1,048,763. Patented Dec.31,1912.

UNITED STATES PATENT OFFICE.

RICHARD TIEDTKE, 0F HCHST-ON-THE-MAIN, GERMANY, ASSIGNOR T0 FARBWERKE VORM. MEISTER LUCIUS & BRNING, 0F HCHST-ON-THE-MAIN, GERMANY, A.

` CORPORATION OF GERMANY.

MIXING-MACHINE.

Patented Dec. 31, 1912.

To all whom it may concern B e it known that I RICHARD TIEDTKE, engmeer, citizen of the Empire of Germany,

,and residing at Hchst-on-the-Main, Gerl ranged in a suitable container mounted to revolve on a horizontal or substantially horizontal axis, helical surfaces, or their equivalents, having a common axis, and the `usual lifting plates, in such a manner that thematerials to be mixed are subjected to the usual tumbling movement and are also caused to travel in a closed path extending from end to end of the container, one of the conveyors moving the material in one direction, while the other, which may be situated within vthe first, returns the material in the opposite direction. l

For example, the materials may be conveyed from one end te thevother of a suit able drum by a revolvin helical blade and returned by revolving 1i ing plates lso constructed that in letting fall again the material they have lifted they guide 'it in the opposite direction to that 1n which it is conveyed by the helical blade. Thus in ad-y dition to receiving the tumbling motion usual in mixing machines the materials travel in a closed path arallel to the axis of the helicalblade. `This axis is horizontal or substantially so, and the elevating plates are preferably in rows along lines parallel to the axis.

An important advantage of the invention is that dryJpowders, such as colors, etc., may be thoroughly mixed without causing dust.

Another advantage is that after mixing, the material may be discharged without changing the direction of rotation of the mixing drum.

The accompanying drawings illustrate the invention, Figure 1 being a longitudinal section, Fig. 2 a cross sectlon on line 2.-2 of Fig. 1, and Fig. 3 a detail view.

a is a drum mounted to rotate about its axis in a horizontal position. On its inner surface is fixed the helical blade or guide b and Within the imaginary cylindrical surface circumscribed by the inner edge of the helical blade are suitably mounted lifting plates c parallel to the axls of the drum and, in cross section,radial to this axis. To these plates are fixed blades or guides d oblique to the length of the plate so that the material which the plate lifts is caused to fall in the direction of the end e of the drum.

At the end L of the drum there is a st-ationary -double spout f f controlled by a revolvlng guide g. When the latter is in the position shown 1n Fig. 3, the materials can be charged into t-he drum through spout f,

yWhereas when the guide is in the position .shown in Fig. l'the mixed materials can be dlscharged through spout ff.

As -the materials are charged into the drum they are lifted by the plates c and caused to travel, while being tumbled, toward the end e; at the same time such portion of them as is not being tumbled travels toward the end h, being conveyed along the surface of the drum by the helix b. The helical blade terminates in chutes z' xed to the end h so that the material carried by the helical blade is delivered through these chutes when it arrives at this end. So long as the guide g remains in the charging position (Fig. 3) the material delivered through in a closed path 1n- Y andthe drum is gradually emptied through spout f.

The usual cylindrical drum is preferred,

but the invention is equally applicable to conical drums. Since there is only one opening both for charging and discharging in one of the ends, the drum can be half filled with the materials, which is not possible in the case of the known conical drums having automatic discharge, wherein the discharge openings are at the edge of the smaller end.

A particularly good intermixture can be obtained by a machine constructed according to the invention, in that Within the cylinder there are, in addition to the usual lifting plates, righty and left hand helical surfaces or guide blades which determine the movement of the materials in a closed path extending from end to end of the drum.

The mixing machine herein illustrated and described and heretofore claimed in this application is claimed inthe divisional application hereof, Serial No. 589,440, filed October 27 th, 1910 for mixing machines.

Having now particularly described and ascertained the nature of my said invention and in What manner the same is to be performed', I declare that'what I claim is y l. The combination With a drum, of a stationary feeding spout and a discharge spout at. one end of the drum, a guide adapted to register With either of said spouts and connect the lsame withI the interior of' the drum and when connected with the feeding spout to close the outlet against discharge of the material from the drum, and when con- -nected With-the discharge spout to receive these materials and discharge them, and lifting means associated with the drum for discharging the materials upon said guide, substantially as described. l

2. In a mixing machine, the combination of a horizontally-rotating mixing cylindery provided with a feeding and discharge lopening and means. for closing the said opening, a series of guides for moving the material fromend` to end of said cylinder, and a series of radial lifting plates extending longitudinally of the cylinder and disposed in a different radial zone from that occupied by saidI guides .for .tumbling the material to be mixed.

3.. In a device of the character specified,

a revolving, horizontal drum provided With' a combined feeding and discharging open- Ying,` means for closing said-opening against 'the discharge of material, a helical guide Within thedrum for conveying material in one direction, lifting plates for tumbling same, and guides for moving the material in the opposite direction, said guides and plates extending substantially from end 'acier/c to end of theb drum, substantially as decharge opening, and extending thence doWnvert material which is lifted back into the ward and inward, whereby it serves to didrum for further mixing and prevent it from entering the delivery chute.

5. In a mixing machine, the combination of a rotatable mixing drum having an axial discharge openinga delivery chute extending through the said opening into the drum v and formed with an outer stationary portion, and an adjustable portion located'within the drum and pivoted to the stationary part of the chute and arranged when in one position to form an extension of the chute Within the drum and when adjusted to another position to form a cut-oil for the chute and for the dischargeA opening, and means for adjusting the said inner section of the chute.

6. In a mixing machine, the combinat-ion of a rotatable mixing drum having an axial discharge opening, a delivery chute extending through the -said opening into the drum and formed with an outer stationary' portion, and an adjustable portion located within the drum and pivoted to the stationary portion arranged When in one position to permit discharge through the discharge opening,and when adjusted to another position to form a cut-olf Within the d rum for the chute and for the discharge opening, and means for adjusting said adjustable portion of the chute.

' 7. In a mixing machine, the combination of a rotatable mixing drum having an axial discharge opening, a delivery chute extending through the said opening into the drum and formed With an outer stationary portion,and an adjustable portion located Within the drum and pivoted to the stationary portion axially of the drum arranged when in one position to permit discharge through the discharge opening, and when adjusted to another position to form a .cut-ofi' Within the drum for the chute and for the discharge opening, and means for adjusting said adjustable portion of the chute.

8. In a mixing machine, the combination of a rotatable mixin drum having a discharge opening, a delivery chute, and agate pivotally supported by the chute and arranged When adjustedto one position to set vertically above the inner end of thel delivery chute and close it and with one of its `In testimony that I claim the foregoing as edges adjacent to the end wall of the drum my invention, I have signed my name in above the 'disehargeo ening and extending presence of two subscribin witnesses.

thence downward an inward whereby it RICHAR TIEDTKE. 5 serves to divert material which is lifted Witnesses: back into the drum for further mixing and JEAN GRUND,

prevent it from entering the delivery chute. CARLl GRUND. 

